On my test environment generating 1 million users in a single transaction takes around 1 minute 21 seconds. This is a little bit longer than Hans-Jürgen’s timing. Suppose this is due to the hardware difference.

Please remember that any review or comparison, including this one, is subjective. Different approaches may produce different results (though it is mostly true for Firebird and PostgreSQL, but not for MySQL).

Yes, it’s possible! Recently I found great Android application Termux.

Termux is an Android terminal emulator and Linux environment app that works directly with no rooting or setup required. A minimal base system is installed automatically – additional packages are available using the APT package manager.

I installed it and my first command waspkg search postgres$ pkg search postgres

Wow! Not only we can have PostgreSQL on Android, but it’s up to date! Cool!